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Flashcards in Muscles Deck (119)
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1

ILIACUS origin

anterior/inferior surface of iliac crest

2

ILIACUS insertion

lesser trochanter of femur

3

ILIACUS action/innervation

Flexes hip

L2, L3
Femoral N.

4

PSOAS MAJOR origin

anterolateral surface of T12 to L5 vertebra

5

PSOAS MAJOR insertion

lesser trochanter of femur

6

PSOAS MAJOR action/innervation

Flexes hip

L2, L3
Femoral N.

7

iliopsoas muscle

iliacus and psoas major

*Different origins, same insertions/action/innervation

8

ADDUCTOR MAGNUS magnus origin

ischium and pubis

9

ADDUCTOR MAGNUS insertion

Linea aspera and adductor tubercle

10

ADDUCTOR MAGNUS action/innervation

adducts hip

Obturator N.
Sciatic N.

11

GRACILIS origin

pubis

12

GRACILIS insertion

pes anserine (anteromedial proximal tibia)

13

GRACILIS action/innervation

adducts hip
flexes knee

Obturator N.

14

RECTUS FEMORIS origin

anterior inferior iliac spine

15

RECTUS FEMORIS insertion

tibial tuberosity

16

RECTUS FEMORIS action/innervation

flexes hip
extends knee

Femoral N.

17

VASTUS LATERALIS origin

lateral anterior surface of femur

18

VASTUS LATERALIS insertion

tibial tuberosity

19

VASTUS LATERALIS action/innervation

extends knee

Femoral N.

20

VASTUS INTERMEDIUS origin

middle anterior surface of femur

21

VASTUS INTERMEDIUS insertion

tibial tuberosity

22

VASTUS INTERMEDIUS action/innervation

extends knee

Femoral N.

23

BICEPS FEMORIS origin

Long head - ischial tuberosity
Short head - linea aspera of femur

24

BICEPS FEMORIS insertion

fibular head

25

BICEPS FEMORIS action/innervation

Long head - extends hip and flexes knee
Short head - flexes knee ONLY

Long head - Sciatic N.
Short head - Common Peroneal N.

26

GLUTEUS MAXIMUS origin

posterior sacrum and ilium

27

GLUTEUS MAXIMUS insertion

greater trochanter of femur and iliotibial band

28

GLUTEUS MAXIMUS action/innervation

extends and externally rotates hip

Inferior Gluteal N.

29

SOLEUS origin

posterior tibia and fibula

30

SOLEUS insertion

calcaneus via the Achilles' tendon

31

SOLEUS action/innervation

plantar flexes ankle

Tibial N.

32

GASTROCNEMIUS origin

posterior medial and lateral condyles of femur

33

GASTROCNEMIUS insertion

calcaneus via Achilles' tendon

34

GASTROCNEMIUS action/innervation

plantar flexes ankle
flexes knee

Tibial N.

35

PERONEUS LONGUS origin

lateral superior fibula

36

PERONEUS LONGUS insertion

plantar surface of cuneiforms and first metatarsal (MT)

37

PERONEUS LONGUS action/innervation

everts foot
plantar flexes ankle (assists)

Superficial Peroneal N.

38

INTERNAL OBLIQUE origin

inguinal ligament

39

INTERNAL OBLIQUE insertion

10 to 12 ribs

40

INTERNAL OBLIQUE action/innervation

Bilateral: flexes trunk
Unilateral: side bends trunk, rotates trunk ipsilateral

8th to 12th Intercostal N.'s
Iliohypogastric N.
Ilioinguinal N.

41

EXTERNAL OBLIQUE origin

5 to 12 ribs laterally

42

EXTERNAL OBLIQUE insertion

iliac crest
linea alba

43

EXTERNAL OBLIQUE action/innervation

Bilateral: flexes trunk
Unilateral: side bends trunk, rotates trunk contralateral

8th to 12th Intercostal N.'s
Iliohypogastric N.
IIioinguinal N.

44

Erector Spinae muscles

*multiple smaller muscles along length of spine

Spinalis
Longissimus
Iliocostalis

45

ERECTOR SPINAE origins

spinous and transverse processes and posterior ribs from the occiput to the sacrum and ilium

46

ERECTOR SPINAE insertions

spinous and transverse processes and posterior rubs from the occiput to the sacrum and ilium

47

ERECTOR SPINAE action/innervation

Bilateral: extend neck and trunk
Unilateral: longissimus and iliocostalis side bend trunk, rotates head and trunk ipsilateral

Spinal N.'s from occiput to sacrum

48

SUPINATOR origin

posterolateral ulna and lateral epicondyle of humerus

49

SUPINATOR insertion

anterior proximal radius

50

SUPINATOR action/innervation

supinates forearm

Radial N.

51

TERES MINOR origin

axillary border of scapula

52

TERES MINOR insertion

greater tubercle of humerus

53

TERES MINOR action/innervation

external rotation of shoulder
depresses humeral head

Axillary N.

54

TRICEPS BRACHII origin

medial head: posterior distal humerus
lateral head: lateral humerus
long head: infraglenoid tubercle of scapula

55

TRICEPS BRACHII insertion

olecreanon process of the ulna

56

TRICEPS BRACHII action/innervation

extend elbow
long head - extends shoulder (assists)

Radial N.

57

DELTOID origin

anterior: clavicle
middle: acromion process of scapula
posterior: spine of scapula

58

DELTOID insertion

deltoid tuberosity of humerus

59

DELTOID action/innervation

ALL: abduct shoulder (primary)

anterior: internal rotation and horizontally adducts shoulder, flexes shoulder (primary)

posterior: external rotation and horizontally abducts, extends shoulder (primary)

Axillary N.

60

LATISSIMUS DORSI origin

inferior angle of scapula; spinous processes T7 to T12; lumbodorsal fascia; sacrum; iliac crest, inferior angle

61

LATISSIMUS DORSI insertion

base (floor) of the bicipital (intertuburcular groove) of the humerus

62

LATISSIMUS DORSI action/innervation

extends and internally rotates the shoulder

Thoracodorsal N.

63

LEVATOR SCAPULA origin

transverse processes of C1 to C4

64

LEVATOR SCAPULA insertion

superior angle of the scapula

65

LEVATOR SCAPULA action/innervation

elevates and downward rotates scapula

C3, C4 nerve roots
Dorsal Scapular N.

66

TRAPEZIUS origin

superior nuchal line of occipital bone; ligamentum nuchae; spinous processes and supraspinous ligament of C1 to T12

67

TRAPEZIUS insertion

upper: lateral clavicle, acromion process
middle: spine of scapula
lower: spine of scapula

68

TRAPEZIUS action/innervation

upper: elevates and upward rotates scapula
middle: retracts scapula
lower: depresses and upward rotates scapula

C3, C4 spinal nerve roots
Spinal Accessory N. (CN XI)

69

PRONATOR TERES origin

medial epicondyle of humerus

70

PRONATOR TERES insertion

midshaft of radius

71

PRONATOR TERES action/innervation

pronates forearm
flexes elbow (assists)

Median N.

72

BRACHIALIS origin

anterior lower half of humerus

73

BRACHIALIS insertion

coronoid process of ulna

74

BRACHIALIS action/innervation

flexes elbow (primary when forearm pronated)

Musculocutaneous N.

75

SUBSCAPULARIS origin

subscapular fossa

76

SUBSCAPULARIS insertion

lesser tubercle of the humerus

77

SUBSCAPULARIS action/innervation

internal rotation of shoulder
depresses humeral head

Upper and Lower Subscapular N.'s

78

BICEPS BRACHII origin

short head: coracoid process of scapula
long head: supraglenoid tubercle of scapula

79

BICEPS BRACHII insertion

radial tuberosity

80

BICEPS BRACHII action/innervation

flexes elbow (primary when forearm supinated)
supinates forearm
long head: flexes shoulder (assists)

Musculocutaneous N.

81

SUPRASPINATUS origin

supraspinous fossa of scapula

82

SUPRASPINATUS insertion

greater tubercle of humerus

83

SUPRASPUNATUS action/innervation

abducts shoulder
elevates humeral head

Suprascapular N.

84

INFRASPINATUS origin

infraspinatus fossa of scapula

85

INFRASPINATUS insertion

greater tubercle of humerus

86

INFRASPINATUS action/innervation

external rotation of shoulder
depresses humeral head

Suprascapular N.

87

PERONEUS BREVIS origin

lateral middle fibula

88

PERONEUS BREVIS insertion

base of 5th metatarsal

89

PERONEUS BREVIS action/innervation

everts foot
plantar flexes ankle (assists)

Superficial Peroneal N.

90

TIBIALIS ANTERIOR origin

lateral tibia and interosseous membrane

91

TIBIALIS ANTERIOR insertion

1st cuneiform and 1st metatarsal

92

TIBIALIS ANTERIOR action/innervation

dorsiflexes ankle
inverts foot

Deep Peroneal N.

93

TIBIALIS POSTERIOR origin

posterior fibula and tibia
interosseous membrane

94

TIBIALIS POSTERIOR insertion

plantar surface of navicular, tarsals, and metatarsals

95

TIBIALIS POSTERIOR action/innervation

plantar flexes ankle
inverts foot

Tibial N.

96

RECTUS ABDOMINIS origin

pubis

97

RECTUS ABDOMINIS insertion

ribs 5 to 7

98

RECTUS ABDOMINIS action/innervation

flexes trunk

7th to 12th Intercostal N.'s

99

STERNOCLEIDOMASTOID origin

sternum and clavicle

100

STERNOCLEIDOMASTOID insertion

mastoid process of temporal bone

101

STERNOCLEIDOMASTOID action/innervation

bilateral: extends head, flexes neck
unilateral: side bends neck
rotates head contralateral

C2, C3 spinal nerves
Spinal Accessory N.

102

VASTUS MEDIALIS origin

medial anterior surface of femur

103

VASTUS MEDIALIS insertion

tibial tuberosity

104

VASTUS MEDIALIS action/innervation

extends knee

Femoral N.

105

SARTORIUS origin

anterior superior iliac spine

106

SARTORIS insertion

pes anserine (anteromedial proximal tibia)

107

SARTORIS action/innervation

flexes, abducts, and externally rotates hip
flexes knee

Femoral N.

108

TENSOR FASCIA LATAE origin

anterolateral iliac crest

109

TENSOR FASCIA LATAE insertion

iliotibial band to the lateral condyle of tibia

110

TENSOR FASCIA LATAE action/innervation

flexes, abducts, and internally rotates hip
extends knee

Superior Gluteal N.

111

GLUTEUS MEDIUS origin

lateral/outer surface of ilium

112

GLUTEUS MEDIUS insertion

greater trochanter of the femur

113

GLUTEUS MEDIUS action/innervation

abducts hip
anterior fibers internally rotate hip
posterior fibers externally rotate hip

Superior Gluteal N.

114

SEMITENDINOSUS origin

ischial tuberosity

115

SEMITENDINOSUS insertion

pes anserine (anteromedial proximal tibia)

116

SEMITENDINOSUS action/innervation

extends hip
flexes knee

Sciatic N.

117

SEMIMEMBRANOSUS origin

ischial tuberosity

118

SEMIMEMBRANOSUS insertion

posteromedial condyle of tibia

119

SEMIMEMBRANOSUS action/innervation

extends hip
flexes knee

Sciatic N.